Police have been granted more time to question three men arrested in East Anglia on suspicion of being involved in the commission, preparation or instigation of acts of terrorism.

Officers from the Metropolitan Police's Counter Terrorism Command arrested the men on Tuesday afternoon.

A man in his 20s was arrested at a business address in Letchworth, Hertfordshire, and two men - one in his 20s and the other in his 30s - were held shortly after raids at two separate residential addresses in the Luton area in Bedfordshire.

Two arrests were made in Luton and a third in Letchworth in Hertfordshire. Credit: ITV News Anglia

Scotland Yard said officers were granted a court warrant for further detention for up to seven days from the time of arrest.

A spokesman said searches of one of two addresses in the Luton area had finished. Officers continued to search the other property.

The arrests and searches are part of an ongoing investigation into Islamist-related terrorism.

Three men from Letchworth and Luton have been arrested on suspicion of being involved in acts of terrorism. Credit: PA

Three men have been arrested in Letchworth and Luton on suspicion of being involved in acts of terrorism.

A man in his 20s was arrested just after midday at a business address in Letchworth, Hertfordshire, while the other two men (one in his 20s and the other in his 30s) were arrested shortly after at two separate residential addresses in the Luton area.

All three are being held on suspicion of being involved in the commission, preparation or instigation of acts of terrorism.

The Metropolitan Police say searches are underway at two addresses in the Luton area as part of the investigation - which is looking into alleged "Islamist-related terrorism".